Improvement in sewing-machines



2 Sheets- -Sheet 2 W. HIRONS & .l. D, MOORE. Sewing-Machines.- N0.141,79]. Patented Augustl2,1873.

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wnNEssEs Fig.4. v 91;m'g as $154M, Fi -3 wwwa AM PHOTD-UTHDGRAPHIC co.ufloseomvs'smacEssf' UNITED STATES \VILLIAM HIRONS AND JAMES D. MOORE,OF GRINNELL, IOWA.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 141,791, dated August12, 1873; application filed May 24. 1873.

To all whom it may concern.-

Be it known that we, WILLIAM HrRoNs and JAMES D. MOORE, of Grinnell, inthe county of Poweshiek and State of Iowa, have invented a new andvaluable Improvement in Sewing-Machines; and we do hereby declare thatthe following is a full, clear, and exact description of theconstruction and operation of the same, reference being had to theannexed drawings, making a part of this specification, and to theletters and figures of ref erence marked thereon.

Figure 1 of the drawings is a representation of our improvedsewing-machine by a plan view. Fig. 2 is a section of the front headexhibitin g the feed-motion. Fig. 4 is a side elevation of the machine.Figs. 3, 5, 6, 7, 8 represent detailed parts of the sewing-machine.

Our invention relates to the feed and tension mechanismsofsewing-machines. Around needle-bar is arranged in connection with arevolving guide-cylinder and a feed-bar, constructed as hereinafterdescribed, whereby the material is moved in any desired direction. Theshuttle is moved in a projecting arm in order to sew sleeves, boot-legs,&c., or sewing patches in large pieces of clothing, which can not wellbe turned around on a sewing-machine, but which could be done withoutdifficulty by a revolving feed-bar.

In the drawings, A represents the foundation-plate of oursewing-machine, which supports the shaft B with two standards, a a, andwhich has the needle-arm O and the shuttle-arm united with it. Theneedle-arm O terminates in a vertical semi-cylindrical bearing, 0, whichis completed to a fully cylindrical bearing by a semi-cylindrical door,0 hinged on one side to the stationary bearing on the needle-arm O bylugs 0 and fastened to the needle-arm at the opposite side with flangesc and screws 0 The said cylindrical bearing has perfectly parallel ends,which serve for end bearings for a revolving head, E, and bottom F,which are united by a standard, G, and are made immovable in a verticaldirection by means of laps or face-bearings e and f. A round needle-bar,0 passes through the centers of the head E and bottom F, and it bearsbetween the said head and bottom, a cone, E, with a flanged head, 6 onthe top of which a forked spring, 0 bears, which enters through a slotbetween the cylindrical door 0 and the needle-arm G, and is fastenedoutside to the needle-arm O. The cone is elevated by the forked end of alever, E which bears on the under side of the flanged head 6 is pivotedto the needle-bar O by a pin, 0 and has a lever, E pivoted to its end bya pin, e, the said lever being adjustable by a concentric slot, 0 and aset-screw, e, at the fore end, and having a smooth bearing at the otherend, which is operated by a cam-groove in a pulley, B on the shaft B.The head E and the bottom F have, near the standard G, two parallelslots, into which the feed-bar H is inserted, which extends down to thesewing-table, where it is provided with a serrated presser-foot, h. Theupper end of the feed-bar H is connected with a horizontal handle, h,and a radial arm, k encircling the bar 0 Arm k is elevated by a spring,k located in a recess in the top E, while a more powerful spring, 1fastened to the needle-arm O, and provided with an angular lip, t bearson the forward arm of a lover, I, thereby forcing its slotted end t onthe top of the arm 71. and pressing the bar H down at intervals, whenthe revolving cam 1 which acts on the end i of the lever I, permits. Thelever I is pivoted to the needle-- arm 0 by a pin, i and the cam I isfastened to the shaft B. The feed-bar H is provided with a projection,1L8, which bears against the cone E and, through its rising and falling,causes the lower part of the bar H to swing to and fro, in which motionthe said bar is supported by the pressure of a'spring, k fastened to thestandard Gr and bearing on the back of the bar H. A stop-lever, K,pivoted to the needle-arm G by a pin, 70, serves to lift the lever I, byaid of a step, 70, out of gear with the cam 1 and thereby to stop theoperation of the feed-bar H, which is then kept up above the sewingplateby the spring h The needle-bar O has a forked head, 0 with a pin, 0which is operated by the forked head of the lever L. The said lever L ispivoted to the needlearm G by a pin, 1, and it has, at the lower end, afriction-roller, l, which travels in the cam-groove m of the wheel M,thereby giving motion to the needle-bar 0 In the place of a sewing-platethere is a shuttle-arm, consisting of an elongation, a of thefoundationplate A, and a rounded cover, N, fastened to the same, whichends in a small circular casing, N, below the needle-bar. The cover Nhas a grooved bearing for the shuttle-bar O, which is provided with avertical end, to which a roller, 0, is fastened at the same centralelevation as the shaft B, to receive a correct motion from thecam-groove o in the pulley B The front end of the bar 0 is provided witha rack, 0 by which it operates a pinion, 19, on a vertical shaft, 11, towhich also a semicircular cam, P, is attached, which fits into thecircular casing N, and operates the crescentshaped shuttle Q. A plate,a, pivoted to the arm N by a pin or screw, it, serves to cover the cam Pand the shuttle Q. The tension of the sewing-thread is effected by thecentral pressure of a spring, R, with a headed pivotpin, 1', on a coupleof revolving elastic dished plates, S S, between the averted rims ofwhich the thread is guided, and forced to pass in a diametricaldirection by the elevated eyes 25 of the double arm T of the projectingspringcase T, which is fastened to the needle-arm G, and has aset-screw, t, fastened or screwed into its top, and by the pressure ofwhich on the spring R the tension of the sewing-thread is regulated. Thespool u revolves on a pin, U, fastened to the arm U, which jut-s outfrom the needle-arm O, and from there the thread 20 passes through therear eye 23 between the tension-plates S S, through the front eye t,through an eye, a, on the outside of the semicylindrical door 0 througha hole in the end of the elongated pin 0 and from there down toward theneedle-bar, in the usual manner. The shaft B is provided with a groovedpulley, B so that it may be driven by a cord or belt from atreadle-wheel.

To operate the machine thelever K is turned back, causing the front endof the lever I to rise, whereby the bar H is raised through the springW. The fabric to be sewed is put on the plate a, and the lever K ismoved down again. The movement of the needle-bar G is the same as thatof the needle-bar of any common sewing-machine. The feed-bar H presseson the fabric like a presser-foot while the needle is descending andrising, but during the latter motion the feed-bar is moved away from theneedle by the rising of the forked head of the lever E, by which thecone E is raised, and the projection h, and with it the bar H, pushedoutward, carrying the fabric along the length of one stitch. After thisthe bar H remains stationary on the fabric, holding the same until theneedle has come down again and is touching it, when it rises and movestoward the needle again, which is at the same time penetrating thefabric, and thereby holding it in place.

For filling the spools of the shuttle, they are placed between thecenter hole on the end of the shaft B and the dimpled end of a spring,ta on the standard a This machine may be used as a common sewing-machineby surrounding the shuttlearm N with a folding table of the sameelevation as the plate a.

The handle h cannot be entirely passed around the needle-bar 0 becausethe bar H and the standard G cannot pass the spring 0 and the lever E;but by reversing the handle to the other side of the said spring andlever, a complete circular seam may be sewn, nevertheless.

What we claim as new, and desire to secure by Letters Patent, is-

1. The feed-bar H, with the serrated presserfoot h, the handle h theencircling-arm If, the projection h, in combination with the cone E withthe flanged head 0 the levers E I, and the springs h, 0 I and h,substantially as described.

2. The combination, with the feeding-foot, of the lifting-lever E andthe pivoted adjustable end lever E having the slot 6 and set-screw a,substantially as specified.

3. The tension device fastened to the needle-arm 0, consisting of themovable springcase T, having the diametrical guide-eyes :2, spring R,set-screw t, and pressure-plates S S, arranged and operatingsubstantially as shown and described.

In testimony that we claim the above we have hereunto subscribed ournames in the presence of two witnesses.

WILLIAM HIRONS. JAMES D. MOORE.

Witnesses:

A. R. HILLYER, J NO. MOWBRAY.

